Step 1: Heat oil in a skillet then add onion and green pepper. cook for about 3-5 minutes until softened. Step 2: Add in mushrooms, garlic, and oregano. Step 3: Cook and stir another 5 minutes until mushrooms have given up their liquid and just start sticking to the pan a bit. Step 4: Add in rice and stir occasionally, while cooking for another couple minutes. Step 5: Add wine (if using) and broth, bring to a boil then quickly reduce heat to simmer, give a little stir, and cover the pan with a well-fitting lid. Cook 15 minutes until rice is tender and liquids are absorbed. Step 6: Season with salt and pepper and serve.